The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X750-50SH is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø80mm bore, 750mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X750-50SH is an 80 mm bore double-acting single-rod cylinder with a rear-cap adjusting screw that provides up to 50 mm of field-adjustable stroke-end reduction. At 0.5 MPa it delivers 2513 N push and 2268 N pull, and at the maximum operating pressure of 0.9 MPa the push force reaches 4523 N, suiting it for pressing, clamping, and format-change tooling where the end position must be fine-tuned without swapping the cylinder.
This model is built with a 25 mm diameter piston rod, PT3/8 ports, and an M20x1.5 rod thread. The -SH suffix confirms a built-in magnet for CMSG/DMSG/EMSG barrel-mounted sensors and a Viton (FKM) seal set, which extends the operating temperature range to 0–150 °C and provides good resistance to hot or aggressive environments. The 28 mm air cushion decelerates the piston at stroke end, and the body length A(SCJ) is 239 mm.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X750-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 750 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 28 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×750 | Nominal (maximum) stroke length in mm. |
| -50 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The 50 mm adjustable stroke lets operators quickly reset the end position when switching between product sizes on packaging or assembly lines, eliminating mechanical stop changes.
In long-stroke pressing or clinching operations, the rear screw compensates for tool wear or material thickness variation without removing the cylinder from the fixture.
On 750 mm stroke transfer or pusher stations, fine-tune the advance limit to prevent over-travel into delicate parts, using the full 4523 N push force at 0.9 MPa when needed.
Choose the SCJ80X750-50SH when you need a long 750 mm stroke with the ability to dial in the exact end position by up to 50 mm on the machine. If 2513 N push at 0.5 MPa is more force than required, the 63 mm bore SCJ63 delivers 1559 N push; if it is insufficient, the 100 mm bore SCJ100 provides 3927 N push. For a fixed-stroke application where no field adjustment is needed, the standard SC80X750 cylinder is a simpler, lower-cost alternative.
At a 750 mm stroke, side-load and rod bending must be managed. Fit an external linear guide or consider a guided cylinder if the load is not perfectly axial. A direct replacement must match the 80 mm bore, 750 mm nominal stroke, 50 mm adjust range, PT thread, built-in magnet, and Viton seal; the mounting is basic, so any SCJ80-compatible foot (LB) or flange (FA) bracket can be added separately.
Adjustable-stroke checklist
At 0.5 MPa the push force is 2513 N and the pull force is 2268 N (the difference is due to the single 25 mm rod). At the maximum operating pressure of 0.9 MPa, push force reaches 4523 N. The theoretical force at 1.0 MPa is 513 kgf.
A rear-cap screw sets the stroke end position within a 50 mm range from the nominal 750 mm stroke; it does not adjust force or speed. The SCJ80X750-50SH can replace an SC80X750 only if the extra body length for the screw is acceptable and the -S magnet and -H Viton seal are required. For a basic fixed-stroke cylinder without adjustment, the SC80 is the direct match.
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